Implemented pay command.
Implemented withdraw functionality. Will do nothing currenlty when given
string arguments for player name. I need to think of a strategy for
this.
Implemented bank owner and manager methods. Currently returns a response
of NOT IMPLEMENTED for members and string lookup methods.
Added method to get bank support.
Added method to get fractional digits.
Added more adapter methods, so that multiple economy types can be
accommodated. I must do this because Vault may be enabled in the system,
but SerenityLoans might be required to defer to the other economy.
Added convenience method to check for bank ownership.
Implemented methods.
Tagged adapter messages with todo notes indicating that I might want to
ignore other economies for conversion purposes.
Implemented bank withdraw/deposit/balance/has methods.
Fixed unused imports.